Pictorial evidence:
https://i.imgur.com/EyYoyET.jpg
Instead of the usual "silver surfer", this problem is something I've rarely encountered before, where the soldiers mounted onto warhorses are entirely invisible. I don't know if this is a problem stemming from missing texture files or typos in the "battle_models" file. It's something you guys should consider fixing, though. It's a minor nuisance, but aesthetically speaking it's not good at all and also breaks immersion to have invisible cavalry soldiers.